Corn earworms are known to ruin sweet corn harvests, but these pests don't limit damage to corn. Carbaryl breaks down by half into an inactive chemical in about 3 1/2 days on plant leaves, and four to 72 days in the soil, depending on the conditions. Start treating the ears as soon the silks emerge and repeat applications once a week until the silks start turning brown. It worked. The corn earworm pupa passes the winter in the soil of mild winter regions. There are commonly four generations of corn earworms each year, more in regions where the summer is long and the winter mild. Avoid using both around bees, which may be killed by exposure. Light brown excrement becomes lodged on the leaf blades and in the whorl. In southern climates, corn earworm pupae overwinter in soil. Dust With Carbaryl. Malathion, an organophosphate, is best for sucking insects, aphids, scale and mites.

There are several biological answers to how to kill corn earworms. Use Sevin every two to three days once silking has begun. Trichogamma is an egg parasite wasp that lays its eggs inside the eggs of the earworm. Wear safety goggles, long pants, a long-sleeved shirt and gloves when applying Sevin for personal protection. Sevin works by preventing nerves from functioning. Green lacewings and soldier beetles are also effective answers to how to kill corn earworms. ... • Sevin. Dust corn silks with Sevin, an insecticide containing carbaryl. Both work on cabbage worms. Spray as needed, but no more than once every seven days. The earworms then move in to lay their eggs on the green silks. Plan the perfect garden with our interactive tool →larva of colorado beetles image by Irina Surikova from

Also known as tomato fruitworms, they target crops from tomatoes and lettuces to legumes. In the 1940s—before the age of synthetic insecticides—gardeners put a dab of mineral oil on the silks at the tips of the ears.

How to Kill Corn Earworms. Sevin, an insecticide containing the neurotoxin carbaryl, is best for corn earworms, cutworms and Japanese and other beetles. Corn earworms prefer the fruiting stages (ears) of corn. Moths emerge in spring, and some wing their way north. Avoid using both around bees, which may be killed by exposure.A broad-spectrum pesticide, Sevin controls a wide range of insects and other pests in vegetable patches, ornamental gardens and orchards. Corn earworms are the larvae of small moths that lay eggs on plant leaves and corn tassels or silks. Copyright Leaf Group Ltd. // Leaf Group Lifestyle. As the blades unfurl, ragged holes are seen in the leaves. Insecticides such as carbaryl (Sevin) can be used, but most families prefer not to use toxic chemicals in their gardens.

All Rights Reserved. This type of damage is known as “shatterworm” injury. Control in corn is 50-100% successful. Corn earworms life cycle. Pests die through eating Sevin, so it must be applied where the targeted pests congregate: on bark, leaves and stems or on the soil around the base of plants. Learn which plants thrive in your Hardiness Zone with our new interactive map! These products treat corn up to three days before harvest, and tomatoes up to one day before you pick and eat. *These products provide up to 3 month control on all listed insects except ticks.|  ©2018 GARDENTECH, INC. All trademarks are the property of their respective owners. Malathion, an organophosphate, is best for sucking insects, aphids, scale and mites. Monitor corn plants closely for any sign of damage and apply a Sevin insecticide suitable for sweet corn or place Sevin baits around plants immediately. Applying a thin, even layer of carbaryl dust to the exterior of corn ears helps eliminate earworms. Sevin Concentrate is labeled for applications on sweet corn. Corn earworms can begin as soon as 10 percent of the ears are silked.
There is a safer way. Sevin also kills beneficial insects such as ladybugs, lacewings and hoverflies, and honeybees, bumble bees, leaf cutter bees and alkali bees.

Symptoms of carbaryl poisoning include stinging, burning, swollen eyes, a burning or sore throat, sweating, chest tightness and wheezing, nausea, retching and vomiting. Multiple generations build up over summer months, but northern winters kill them. GardenTech ® brand offers several options to kill corn earworms and keep protecting for up to three months*. It eradicates the following insects: corn rootworms, corn earworms, European corn borers and Southwestern corn …
Early in the season, corn earworm larvae feed on the foliage of seedlings in the whorls. We have tools to control earworms and borers. Sevin, an insecticide containing the neurotoxin carbaryl, is best for corn earworms, cutworms and Japanese and other beetles. Both work on cabbage worms.